Evaporative refrigerator



E. A. STUBBS.

EVAPORATIVE REFRIGERATOR.

APPLICATION FILED JUNE 25,1918.

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Patented Jan. W, 19229 nrmnsr'nnnnnr err-ens, or srarrnnns, nnrrrsneorn'nara, earth EVAPQRATIVE EEFRIGERATQBJ.

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To all whom it may concern.-

lBe it known that l, ERNEST A. S'runas, a citizen of Canada, and aresident of Smithers, Province of British Columbia, and Dominion ofCanada, have invented certain new and useful Improvements in anEvaporative Refrigerator, of which the following is a specification.

This invention relates to refrigerators, and more particularly to animproved cooler adapted to receive and contaln perishable foo stuff, andpreserve th same for aconsiderable length of time While the contents isbeingshipped. I

Une of the objects of the invention is to provide an improved cooler ofthis character that ma be employed for shipping purposes and byouseholders having small quantities of food stud to be kept for a shortperiod of time during hot weather.

A further object of the invention is to provide a cooler of thischaracter adapted to be employed for preserving perishable food withoutthe use of ice, the container being constructed to exclude the naturalheat of the atmosphere, and preserve the ame from contact with the air.

Further objects of the invention will be readily apparent from aconsideration of the 2-2 of Fig. 1.

following detailed description of the invention and of the accompanyingdrawing, illustrating the preferred embodiment, wherein:

Figure 1 is a vertical section through the device constructed inaccordance with my invention.

Figure 2 is a transverse section on the line Figure 3 is a fragmentaryperspective view of a portion of the invention.

Referring to the drawing, wherein is illustrated the preferred form ofmy invention and 'in which like characters of reference indicate thecorresponding parts throughout the several views, a cylindrical storagetank 1 is constructed of watertight material preferably of thin metaland is enclosed at one end bye bottom wall while its opposite end isopen. This storage tank 1 is enclosed and embraced by a basket 2 which,as shown in Fig. 3 of the drawing, is constructed of laminated stripsclosely interwoven and shaped to conform to the shape of the storagetank 1. An outer re taining basket 3, of considerably greater diameteris constructed in the same manner Specification of letters Patent.

Patented Qllano Ml fltfiF.

Application filed June 25, 1918. serial Ho. aereae.

and receives the inner basket and the storage tank to provide aninterior space in which cool water may be placed when the device isused. The top of the outer basket 3: is of frusto-conical formation andits upper marginal edge is joined to the upper marginal edge of theinner basket 2. The inner and outer baskets, while both are constructedof the laminated strips, will maintain the tank in properly spacedrelation at the center of the cooler and water will be permitted to passbetween the strips and enter the space surrounding the inner basket.

A. water retaining porous bag 4 receives the outer basket 3 and isconstructed of canvas or similar fabric for the purpose of containingwater and permitting evaporation when the wind or air circulates aboutthe bag, the evaporation of the water causing absorption of heat fromthe interior of the bag. The outer basket 3 fits snugly within the bag 4and the top of the bag is of frusto-conical formation to fit thefrustoconic al top of the outer basket 3. An inlet open ng for fillingthe bag with water is provided by mounting a short-neck 5 near the topof the bag and this may be closed by a cap 6 fastened in any preferredmanner. Near the upper edge of the outer basket 3, at diametricallyopposite points, are the loops 7 to which a handle or bail 8 is attachedfor carrying the cooler. The top of the storage tank is provided with aremovable cover 9 provided with an annular flange 10 adapted tofit thetop of the storage tank to exclude air and moisture from the tank.

When in use, the perishable food stuff will be stored in the tank 1 andwater-will be poured into the bag through the neck 6 thus filling thespace between the inner and outer baskets. The baskets, as stated, areconstructed from laminated strips and these strips are preferably ofthin metal so that they will readily transmit heat. These strips may becopper plated, if desired, for the purpose of preventing rust. Thebottom of the inner basket is spaced above the bottom of the. outerbasket, thus permitting a circulation of water beneath the tank so thatthe entire area of the tank is exposed to the cooling action of thewater.

From the foregoing, it will be observed that a very simple and durablecooler has been provided, the details of which embody the preferred rrm, l desire, to be under= stood, that slight changes may be made in thedetails of construction without departing from the spirit of theinvention or the sctipe of the claims hereunto appended:

claim;

1. An evaporative refrigerator comprising an inner storage tank, abasket enveloping said tank, a second basket enveloping the first namedbasket and being spaced therefrom on all sides and on the bottom toprovide a liquid space between said baskets and conical and having itsupper end meeting with the upper end of said inner basket, and awater-retaining porous bag fitted about eoaraa said outer basket andhaving its upper end also, formed substantially conical to fit snuglyover the conical end of said outer basket.

3. An evaporative refrigerator comprising a cylindrical metallic'storagetank for holding perishable articles having its bottom closed and itstop open, a flanged closure for the open top of said tank, a basketenveloping the sides and bottom of said tank and tight embracing thesame, said basket being ma e up of thin flat strips of metal interwoven,an outer basket surrounding said inner basket and spaced annularlytherefrom on the sides and also spaced from the bottom thereof toprovide a chamber enveloping the sides and bottom of said tank forcontaining liquid, said outer basket being also made up of interwoventhin flat strips of metal, a liquid retaining porous bag fitted aboutsaid outer basket, means whereby the chamber between said baskets may be.filled with liquid, and a supporting means for said refrigerator.

ERNEST AUBREY STUBBS.

